Factory sealed, valve regulated, maintenance-free design eliminates damage from acid spills and corrosion; environmentally safe Patented top, front and side connection terminal design provide easy multiple terminal installations, increased power flow, long terminal connection strength and durability Heavy cast positive and negative full frame grids provide the highest amp hour and cranking amps and the lowest self-discharge rates for successful high voltage off-season storage Large over the partition straps and welds increase durability, power output, and life Patented recessed quad terminal cover design facilitates multi-terminal fitment for accessory cable fitment